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Last word

Â鶹´«Ã½'s popular Last Word series gives readers the opportunity to answer each other's questions about everyday science phenomena, from the shape of scones to the evolutionary history of toenails. To answer a question or ask a new one, email lastword@newscientist.com

Planet in water - Moon. Science fiction art. Solar system. Elements of this image furnished by NASA; Shutterstock ID 579784837; purchase_order: -; job: -; client: -; other:

Last Word

If all Earth’s water were put in a ball, how large would it be? Part 2

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2HR09CM Killer whale, Orcinus orca, spy hop, Vestfjord, Ofotfjord, and Tysfjord, Lofoten Islands, Norway, Atlantic Ocean

Last Word

This week’s new questions

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In the Medical Laboratory, Anonymous Female Patient Lying on a CT or MRI Scan Bed Undergoes Scanning Procedure with Red Lasers. Advanced Healthcare Facility with High-Tech Equipment; Shutterstock ID 2587414477; purchase_order: -; job: -; client: -; other:

Last Word

Why are MRI machines so noisy and what stops us making them quieter?

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Will the ocean ever be too salty for life to thrive? Part 2

Last Word

Will the ocean ever be too salty for life to thrive? Part 2

Regulars

Issue no. 3581 published 7 February 2026

Â鶹´«Ã½ issue 3581 cover
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